DE102017211752A1 - Vehicle tires - Google Patents

Abstract

Pneumatic radial pneumatic vehicle tire with a tread (1) which consists of an electrically non-conductive rubber material at least on its surface in contact with the ground, - a carbon center beam (12) in the tread of an electrically conductive rubber material, - at least two, with Reinforced belt layers (2a, 2b), wherein at least the strength members in the radially outermost belt layer (2b) are embedded in an electrically non-conductive rubber coating, - as a winding bandage of at least one bandage strip (10) created or existing (9), the The belt bandage (9) has at least one bandage strip (10) along its upper side edge edges of the radially outermost belt layer (2b) with edge sections (9a) superior belt bandage (9 and mit- side walls (7) made of an electrically non-conductive rubber material. and the underside each at least one parallel or substantially para Runs to the reinforcing elements extending electrically conductive thread (13) and which bandage strip (10) on at least one of the edge portions (9a) with each other overlapping wound turns, so that on the underside of the Bandagestreifens (10) located thread (13) with the thread (13) on the upper side of the Bandagestreifens (10) is in contact, and wherein in the edge portion (9a) of the thread (13) on the underside in mounted on a rim tire with the rim via electrically conductive, located in the tire components in electrically conductive Connection is.

Description

• - einem Laufstreifen, welcher zumindest an seinem mit dem Untergrund in Kontakt tretenden Bereich aus einem elektrisch nicht leitfähigen Gummimaterial besteht,
• - einem im Laufstreifen befindlichen Carboncenterbeam aus einem elektrisch leitfähigen Gummimaterial,
• - zumindest zwei, mit Festigkeitsträgern verstärkte Gürtellagen, wobei zumindest die Festigkeitsträger in der radial äußersten Gürtellage in eine elektrisch nicht leitfähige Gummierung eingebettet sind,
• - einer als Spulbandage aus zumindest einem Bandagestreifen erstellte bzw. bestehende, die seitlichen Randkanten der radial äußersten Gürtellage mit Randabschnitten überragenden Gürtelbandage, wobei jeder Bandagestreifen aus in eine elektrisch nicht leitfähige Gummierung eingebetteten, parallel zueinander und in Streifenlängsrichtung verlaufenden Festigkeitsträgern besteht und die radial äußerste Gürtellage in parallelen Windungen spiralförmig umwickelt,
• - Seitenwänden aus einem elektrisch nicht leitfähigen Gummimaterial.

The invention relates to a pneumatic vehicle tire with radial design

• a tread which consists of an electrically nonconductive rubber material at least on its region in contact with the substrate,
• a treadmill carbon center beam made of an electrically conductive rubber material,
• at least two belt layers reinforced with reinforcements, wherein at least the reinforcing elements in the radially outermost belt layer are embedded in an electrically non-conductive rubber coating,
• - One as Spulbandage from at least one Bandagestreifen created or existing, the lateral edges of the radially outermost belt layer with edge sections superior belt bandage, each Bandagestreifen embedded in an electrically non-conductive rubberization, parallel to each other and running in the strip longitudinal strength and the radially outermost belt layer spirally wound in parallel turns,
• - Side walls made of an electrically non-conductive rubber material.

In order to reduce the rolling resistance of tires, it is common to produce as many of the rubber-material or rubber-containing tire components as, for example, the tread and sidewalls, from rolling-resistant rubber compounds. Such rubber blends contain either low active fillers or minor amounts of filler or silica instead of carbon black. However, rubber compounds made with low rolling resistance give the rubber components made therefrom such a high electrical resistance that they are no longer electrically or insufficiently conductive, so that appropriate measures must be taken to dissipate the electrostatic charge which occurs during driving by using the tread that comes into contact with the roadway the metallic tire rim is electrically connected. The electrical conductivity is too low for tire components made of such rubber mixtures, which contain carbon black in very small amounts and / or carbon black with a low activity or a small BET.

A tire of the type mentioned is for example from the DE 10 2015 223 339 A1 known. This pneumatic vehicle tire has electrically non-conductive sidewalls and a radial two-layer tread of an electrically conductive tread base and an electrically non-conductive tread cap in contact with the roadway. Over the circumference of the tread cap extends at least one so-called Carbon Centerbeam, which also contacts the tread base. Electrically conductive threads are applied on the inside of the side walls and the electrically conductive components in the bead areas such that they form electrically conductive passages between the tread base and the electrically conductive components in the bead areas.

From the EP 2 582 531 B1 Further, a pneumatic vehicle tire is known, the carcass ply is provided on at least one of its surfaces with threads which are partially electrically conductive coated threads of cotton or PET.

In order to reduce the rolling resistance of tires, there is a trend to produce as many rubber materials as possible in the tire of low-rolling rubber compounds, thus rubber mixtures with an insufficient for electrostatic dissipation electrical conductivity. In addition to the side walls, therefore, the tread completely, so its tread base, and the rubber linings of the belt layers and the belt bandage should be made of such a rubber compound. This requires finding new solutions for providing electrically conductive connections between the surface of the tread contacting the ground and the electrically conductive metallic rim.

The invention is based on the object, in a tire of the type mentioned, in which the rubber coatings in the bandage and the belt are electrically non-conductive to provide with simple and easy to produce measures for electrically conductive passages between the tread and the rim ,

The object is achieved according to the invention in that the belt bandage has at least one Bandagestreifen along the top and bottom of each at least parallel or substantially parallel to the strength members extending electrically conductive thread and which bandage strip at least one of the edge portions overlapping wound turns so that the thread located on the underside of the Bandagestreifens is in contact with the thread on the upper side of the Bandagestreifens, and wherein in the edge portion of the thread on the underside mounted on a rim tire with the rim via electrically conductive, located in the tire components in electrically conductive connection.

By the invention is in a simple and convenient manner on the belt bandage by means of electrically conductive threads an electrically conductive connection between the top of the belt bandage, which is for example in contact with the Carboncenterbeam in the tread, and the underside of the belt bandage over which the electrically conductive connection to Rim made, manufactured. Both the belt bandage and the belt layers may have advantageous electrically non-conductive rubber coatings for low rolling resistance.

In a preferred embodiment variant, the turns of the bandage strip overlapping in the edge section of the belt bandage with the turns of the belt bandage belong to a run-stop of the bandage strip. As is known, a run-stop is created essentially from only one turn of the bandage strip and is sufficient to ensure the desired contacting of the threads on the top and bottom of the bandage strip.

In an alternative, in several places, a mutual contacting of the threads on the top and bottom of the Bandagestreifens effecting execution overlaps in the edge portion of the belt bandage with the turns of the belt bandage a number of turns of Bandagestreifens.

The belt bandage itself can be created from one or more bandage strips, their Spulbild can be performed in various ways. In one possible embodiment, the belt bandage consists of a single bandage strip, which has overlappingly wound turns at both edge portions. In a further likewise preferred embodiment variant, the belt bandage has two bandage strips which in each case have turns wound in an overlapping manner on one of the edge sections. At least one of these bandage strips is provided on its top and bottom with an electrically conductive thread.

The edge portion of the belt bandage can be connected in different ways via electrically conductive components, as already mentioned, electrically conductive with the rim. Preferably, the electrically conductive components include an electrically conductive or executed carcass ply, which is in contact with at least one electrically conductive, the rim contacting component in the bead region of the tire. Here, the edge portion of the belt bandage or his thread on the bottom of the electrically conductive equipped or executed carcass insert contact directly.

Particularly preferred is an embodiment in which the carcass ply has an electrically conductive Karkassgummierung. In this way, the carcass gumming can contribute to a reduction of the rolling resistance of the tire. However, it is also possible to use an electrically nonconductive carcass gumming, wherein the electrical conductivity is ensured, for example, by electrically conductive threads positioned on the outside of the carcass ply.

Furthermore, an embodiment is particularly preferred in which the electroconductive components include a belt edge pad that is equipped or carried out in an electrically conductive manner and that is in contact with the carcass ply, which is provided with or is equipped with an electrically conductive finish.

The belt edge pad is preferably configured to surround the edge of the belt ply radially disposed within the outermost belt ply and to have a radially inner and a radially outer turnup portion.

The belt edge pad itself can consist of an electrically conductive rubber material, but in a preferred embodiment consists of an electrically non-conductive rubber material, wherein on the outside of the belt edge pad at least one electrically conductive thread extends over the circumferential extent of the belt edge pad that he partially over the radial inner and partially over the radially outer envelope portion extends.

Further preferred is an embodiment in which the tread base consists of an electrically non-conductive rubber material, since in this case also the tread base can contribute to a reduction of the rolling resistance of the tread. In this case, the carbon center beam is preferably designed to have an axially stripe-shaped portion positioned in the tread base, the rubber material of which is in contact with the thread at the top of the bandage strip (s).

The electrically conductive threads are preferably made of an electrically non-conductive carrier thread, for example, polyester, polyamide, cotton or hybrids of these materials, wherein the carrier thread is provided with an electrically conductive coating. Carrier threads of the mentioned materials have the advantage that they can be selected according to the expansion behavior of the components on which they are positioned.

The electrically conductive coating can be designed in different ways. Embodiments are preferred in which the electrically conductive coating contains or consists of electrically conductive particles, wherein the electrically conductive particles are, for example, soot particles, graphite particles or carbon nanotube tubes. Particularly preferred is an embodiment of the electrically conductive coating of a bonding agent, preferably, the electrically conductive coating is a resorcinol-formaldehyde-latex dip containing electrically conductive particles, in particular soot particles. With such a coating, the advantage of electrical conductivity is combined with the advantage of good adhesion of the threads to the corresponding tire component.

• 1 zeigt einen Teilquerschnitt durch einen Fahrzeugluftreifen für einen Personenkraftwagen in radialer Bauart und
• 2 eine Draufsicht auf eine Ausführungsvariante eines Spulbildes einer Gürtelbandage und
• 3 eine Draufsicht auf eine weiteren Ausführungsvariante eines Spulbildes einer Gürtelbandage.

Further features, advantages and details of the invention will now be described with reference to the schematic drawing illustrating exemplary embodiments. Show

• 1 shows a partial cross section through a pneumatic vehicle tire for a passenger car in radial design and
• 2 a plan view of an embodiment of a Spulbildes a belt bandage and
• 3 a plan view of another embodiment of a Spulbildes a belt bandage.

In the following description and in the claims, an electrically conductive rubber material or an electrically conductive rubber coating is understood as meaning such or which has an electrical resistance of <10 ⁸ ohms, under an electrically nonconductive rubber material or An electrically nonconductive gumming is understood to mean one which has an electrical resistance ≥ 1 × 10 ⁸ ohms.

In 1 the components running in the tread area are shown with mutual distances, which are not present in the vulcanized tire. In the vulcanized tire, these components contact each other.

The in 1 shown pneumatic vehicle tire has a tread 1 , one radially inside the tread 1 arranged, in the embodiment shown two-ply belt bandage 2 with a belt bandage 9 on, furthermore a carcass insert 3 , an airtight inner layer 4 , Bead areas with horn profiles 8th , tensile bead cores 5 and on the bead cores 5 sitting core profiles 6 , as well as side walls 7.

The tread 1 is constructed in the exemplary embodiment in the radial direction of two layers and consists of a tread profiling containing outer tread layer - a so-called tread cap 1a and one radially inside the tread cap 1a located inner tread layer - a so-called tread base 1b - together. The tread base 1b extends in the axial direction over the entire width of the tread cap 1a , The tread cap 1a and the tread base 1b consist of electrically non-conductive rubber materials, alternatively, the tread base 1b also consist of an electrically conductive rubber material.

The belt bandage 2 has a radially inner, first belt layer 2a and a radially outer, second belt ply 2 B as well as a belt bandage 9 on. The belt layers 2a . 2 B each consist of a belt rubber coating, which is not electrically conductive, embedded strength members, such as steel cords, which in each belt position 2a . 2 B parallel to each other and at an acute angle, which is usually selected in the range of 15 ° to 28 °, to the circumferential direction of the tire. In a known way, they cross in one belt layer 2a located reinforcing straps those in the other belt layer 2 B run.

The belt bandage 9 consists of in a Bandagengummierung, which is also electrically non-conductive, embedded strength members, in particular of a textile material, such as a polyamide, and covers and surmounted belt edge side belt edges of the second belt layer 2 B with edge sections 9a , The belt bandage 9 is a so-called spool bandage, for example, and as in 2 and 3 shown in two identical bandage strips 10 , These are about 10 mm to 15 mm wide rubber compound tapes with embedded, in the longitudinal direction of the bands and parallel to each other strength members, created by means of two winding heads. The two bandage strips 10 are from the middle of the belt bandage starting to the marginal edges of the second belt layer 2 B and a piece over the margins of the second belt layer 2 B out in parallel turns by spirally wrapping the second belt ply 2 B applied, wherein the windings may also partially overlap or may be present in a known gap winding. In the border sections 9a There is in each case a so-called run-stop, wherein a complete turn in the circumferential direction is applied in overlap with the last peripheral turn and in particular a short piece of the bandage strip 10 is applied in opposite directions to the already existing turns. At the in 3 shown embodiment of a Spulbildes a belt bandage 9 this has instead of run-stops each a backwinding of the bandage strips 10 in several turns, which therefore in opposite directions to the turns on the radially outermost belt layer 2 B run. In an alternative, not separately shown embodiment of the belt bandage this is created from a single bandage strip, which is preferably wound at both edge portions with overlapping turns. It is also possible to make the belt bandage from more than two bandage strips. The illustrated and further, not shown Spulbilder are well known from the prior art.

In the embodiment shown, the marginal edges of the radially inner, first belt layer 2a in a known manner of Gürtelkantenpolstern 11 surround. Each belt edge pad 11 is a strip of a rubber material, each having an edge-side edge portion of the belt layer 2a with a radially outer envelope section 11a on its upper side (radially outer side) and with a radially inner envelope section 11b contacted on the underside (radially inner side). The belt edge pads 11 consist, depending on the design, either of an electrically conductive or an electrically non-conductive rubber material, as will be described. In an alternative, not separately shown embodiment no belt edge pads are available.

The carcass insert 3 has in a known manner in a carcass gumming embedded reinforcement and is around the bead cores 5 from axially inward to axially outward in carcass bumps 3a led around ending. The Karkassgummierung consists, depending on the design, either of an electrically conductive or of an electrically non-conductive rubber material. If the carcass gumming is electrically nonconductive, then it is at least provided on its outer surface facing away from the inner layer in an electrically conductive manner, as will be described below.

The side walls 7 consist of an electrically non-conductive rubber material and extend from the tread 1 to the respective horn profile 8th which is the carcass jump 3a projected in the radial direction and with its protruding portion in contact with the outside of the carcass ply 3 is. In the radially outer region, the side walls can be replaced by Wingprofile, which also consist of an electrically non-conductive rubber material. The horn profiles 8th consist of an electrically conductive rubber material and are outside of the side walls 7 overlaps. If the pneumatic vehicle tire is mounted on a rim, not shown, then the Homprofile 8th in contact with the electrically conductive metallic rim. If the homprofiles are not electrically conductive, they can, for example, be traversed by a separate electrically conductive component.

The tread base 1b is in direct contact with the belt bandage 9 , this with the second belt layer 2 B , the second belt layer with the first belt layer 2a , which are directly on the carcass insert 3 located. The radially outer envelope section 11a each belt edge pad 11 is outside of the edge section 9a the belt bandage 9 contacted. The radially inner envelope section 11b each belt edge pad 11 contacts the outside of the carcass ply 3 , If no belt edge pads are provided, contact the edge sections 9a the belt bandage 9 the carcass ply 3 ,

To ensure the discharge of electrostatic charge, the measures described below are taken. The tread 1 contains an electrically conductive carbon centerbeam 12 (commonly referred to as CCB), which is particularly and preferably a circumferentially encircling, electrically conductive rubber profile which comes in contact with the ground at the outer surface of the tread. At the in 1 shown embodiment with a tread base 1b Made of an electrically non-conductive rubber material, there is the Carboncenterbeam 12 out of a the tread cap 1a in the radial direction passing through, for example, strip-shaped section 12a and a further, in particular in the circumferential direction, but in the axial direction of a certain width having particular strip-shaped portion 12b which is in the tread base 1b is used. The section 12b of the Carboncenterbeams 12 is in contact with the top (the radially outer side) of the belt bandage 9 , preferably with both bandage strips 10 , Consists of the tread base 1b made of an electrically conductive rubber material, the Carboncenterbeam 12 only the section 12a on, the electrically conductive tread base 1b yes contacted the belt bandage 9 over its entire width.

On both sides, the top and the bottom, the belt bandage 9 is in each case preferably parallel or substantially parallel to the reinforcements in the bandage strip 10 running, per bandage strip 10 at least one in common with the turns of the Bandagestreifen 10 the belt bandage 2 circulating "endless" thread 13 , optionally also two such threads 13 which is used in the production of bandage strips 10 or during the winding process on each side of the bandage strips 10 is applied. The "endless" threads 13 Therefore, they revolve analogously to the reinforcements of the bandage strips 10 the tire in the circumferential direction. The mutual distance of the thread turns is preferably in the order of 8 mm to 15 mm. In the border sections 9a passes through the circumferential turn in run-stop ( 2 ) or the turns of the rewinds of Bandagestreifen 10 ( 3 ) of each located on the bottom thread 13 in Contact with the thread 13 on the top of the bandage strip 10 , This will create an electrically conductive connection between the Carboncenterbeam 12 , which each thread 13 at the top of the bandage strips 10 contacted, and the threads 13 at the bottom of the bandage strips 10 produced. The bottom of the edge sections 9a is thus electrically conductive in contact with the Gürtelkantenpolstern 11 , which are electrically conductive and equipped with the carcass 3 are in contact.

On the outside of the carcass ply 3 are, if this has an electrically non-conductive Karkassgummierung, according to a preferred embodiment parallel to each other also electrically conductive threads 13 applied at mutual distances of preferably at least 60 mm. These threads 13 can analogously to the reinforcements in the carcass 3 in the radial direction or under an angle deviating from the radial direction by in particular up to 45 °.

Pass the belt edge pads 11 made of an electrically non-conductive rubber material is on the outside of each belt edge pad 11 at least one electrically conductive thread 13 applied, which over the circumferential extent of the belt edge cushion 11 runs, that he partly over the radially inner and partly over the radially outer envelope section 11a . 11b extends, so that the thread portion at the outer turnup portion 11a the thread 13 at the bottom of the belt bandage 9 , the thread portion at the inner turnup portion 11b The strings 13 on the carcass ply 3 contacted. Alternatively, several, in particular parallel to each other threads 13 on the outside of each belt edge pad 11 be applied accordingly.

The electrically conductive threads 13 consist of an electrically non-conductive carrier thread, for example of polyester, polyamide, cotton or hybrids of the aforementioned materials, and an electrically conductive coating. The electrically conductive coating may contain or consist of electrically conductive particles, for example soot particles, graphite particles or carbon nanotubes. The electrically conductive coating can furthermore be an adhesion promoter, preferably an RFL dip (resorcinol-formaldehyde-latex dip), which contains electrically conductive particles, preferably carbon black, for example carbon black of the type N339. After the coupling agent is admixed with electrically conductive particles, preferably dispersed, the electrical conductivity and, in addition, good adhesion of the threads 13 secured in the tire.

LIST OF REFERENCE NUMBERS

1

tread

1a

tread cap

1b

Tread rubber base

2

belt Association

2a, 2b

belt layer

3

carcass

3a

a carcass

4

inner layer

5

bead

6

apex

7

Side wall

8th

Horn profile

9

belt bandage

9a

edge section

10

bandage strip

11

Belt edge cushion

11a, 11b

Turnup

12

Carbon Center Beam

12a, 12b

strip-shaped section

13

thread

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102015223339 A1 [0003]
• EP 2582531 B1 [0004]

Claims (18)

Pneumatic vehicle tires in radial construction with - a tread (1), which consists at least at its coming into contact with the ground area of an electrically non-conductive rubber material, - an in-tread Carboncenterbeam (12) of an electrically conductive rubber material, - at least two, with Reinforced belt layers (2a, 2b), wherein at least the strength members in the radially outermost belt layer (2b) are embedded in an electrically non-conductive rubber coating, - as a winding bandage of at least one bandage strip (10) created or existing (9), the lateral edge edges of the radially outermost belt layer (2b) with edge portions (9a) superior belt bandage (9), wherein each Bandagestreifen (10) embedded in an electrically non-conductive rubberization, parallel to each other and extending in the strip longitudinal strength members and the radially outermost belt layer (2b in paral Lelen windings wrapped spirally, - side walls (7) made of an electrically non-conductive rubber material, characterized in that the belt bandage (9) at least one Bandagestreifen (10) along the top and bottom of each at least one parallel or substantially parallel to the Strengthening extending electrically conductive thread (13) and which bandage strip (10) on at least one of the edge portions (9a) has overlapping wound turns, so that on the underside of Bandagestreifens (10) located thread (13) with the thread (13) on the top of the Bandagestreifens (10) is in contact, and wherein in the edge portion (9a) of the thread (13) on the underside when mounted on a rim tire with the rim via electrically conductive, located in the tire components in electrically conductive connection. Pneumatic tire after Claim 1 , characterized in that in the edge portion (9a) with the turns of the belt bandage (9) overlapping turns of the Bandagestreifens (10) to a run-stop of the Bandagestreifens (10). Pneumatic tire after Claim 1 , characterized in that in the edge portion (9a) with the turns of the belt bandage (9) in each case a number of turns of the Bandagestreifens (10) overlaps. Pneumatic vehicle according to one of Claims 1 to 3 , characterized in that the belt bandage (9) consists of a single bandage strip, which at both edge portions (9a) having each other overlapping wound turns. Pneumatic vehicle according to one of Claims 1 to 3 , characterized in that the belt bandage (9) has two bandage strips (10) which each have at one of the edge portions (9a) with each other overlapping wound turns. Pneumatic vehicle according to one of Claims 1 to 5 characterized in that the turns of the threads (13) on the top and bottom of the bandage strip (s) (10) are spaced at intervals of 8.0 mm to 15.0 mm. Pneumatic vehicle according to one of Claims 1 to 6 , characterized in that to the electrically conductive components, via which the edge portion (9a) of the belt bandage (9) is electrically conductively connected to the rim, an electrically conductive equipped or executed carcass ply (3) belongs, which with at least one electrically conductive , the rim contacting member is in contact in the bead area of the tire. Pneumatic tire after Claim 7 , characterized in that the edge portion (9a) directly contacted the electrically conductive equipped or executed carcass ply (3). Pneumatic tire after Claim 7 or 8th , characterized in that the carcass ply (3) comprises either an electrically conductive Karkassgummierung or an electrically non-conductive carcass gumming, which is provided on its outer side with electrically conductive threads (13). Pneumatic vehicle according to one of Claims 1 to 6 . 7 or 9 , characterized in that to the electrically conductive components, via which the edge portion (9a) of the belt bandage (9) is electrically conductively connected to the rim, an electrically conductive equipped or executed Gürtelkantenpolster (11) belongs, which equipped with the electrically conductive or executed carcass ply (3) is in contact. Pneumatic tire after Claim 10 characterized in that the belt edge pad (11) surrounds the edge of the belt ply (2a) disposed radially inside the outermost belt ply (2b) and has a radially inner and a radially outer turnup portion (11a, 11b). Pneumatic tire after Claim 10 or 11 , characterized in that the belt edge pad (11) consists of an electrically conductive rubber material. Pneumatic tire after Claim 10 or 11 , characterized in that the belt edge pad (11) consists of an electrically non-conductive rubber material, wherein on the outside of the belt edge pad (11) at least one electrically conductive thread (13) extends over the circumferential extent of the belt edge pad (11), that he partially over the radially inner and partly over the radially outer envelope portion (11a, 11b) extends. Pneumatic vehicle tire having a tread (1) with a tread base (1b) made of an electrically non-conductive rubber material, according to one of Claims 1 to 13 characterized in that the carbon center beam (12) has an axially strip-shaped portion (12b) in which the tread base (1b) has its rubber material attached to the thread (13) at the top of the bandage strip (s) (10) ), is in contact. Pneumatic vehicle according to one of Claims 1 to 14 , characterized in that the electrically conductive threads (13) consists of an electrically non-conductive carrier thread, for example of polyester, polyamide, cotton or hybrids of these materials, wherein the carrier thread is provided with an electrically conductive coating. Pneumatic tire after Claim 15 , characterized in that the electrically conductive coating contains or consists of electrically conductive particles, wherein the electrically conductive particles are, for example, soot particles, graphite particles or carbon nanotubes. Pneumatic tire after Claim 15 or 16 , characterized in that the electrically conductive coating is an adhesion promoter, preferably a resorcinol-formaldehyde-latex dip, which contains electrically conductive particles, in particular soot particles. Pneumatic vehicle according to one of Claims 1 to 17 , characterized in that the electrically non-conductive rubber materials and rubber coatings have an electrical resistance ≥ 10 ⁸ ohms, the electrically conductive rubber materials and rubber coatings an electrical resistance <10 ⁸ ohms.

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